class_docstr: Simple scheduler that just runs trials in submission order.
code: def on_trial_add(
      self, tune_controller: "TuneController", trial: Trial
  ):
      pass
  
imports: from typing import Dict, Optional, TYPE_CHECKING
  from ray.air._internal.usage import tag_scheduler
  from ray.tune.result import DEFAULT_METRIC
  from ray.tune.experiment import Trial
  from ray.util.annotations import DeveloperAPI, PublicAPI
label_desc: Use image node_id 2 for calling the FIFOScheduler obj's underlying member method code with example usage: obj.on_trial_add(tune_controller, trial) without return types